Drawing faucet

Abstract

A drawing faucet includes a drawing sensing structure. The drawing sensing structure includes sense marks and a sensor. The number of the sense marks is at least two, they are provided on the drawing hose at intervals along a length direction of the drawing hose. The sensor is configured to sense the movements of the sense marks. During a drawing process of the drawing hose, at least the sense marks at two ends along the length direction can follow the movement of the drawing hose and be sensed by the sensor. The automatic water discharge control unit correspondingly controls the water discharge to change the water discharge strategy according to the sensing signal of the sensor.

What is claimed is: 
     
       1. A drawing faucet, comprising a faucet body, a drawing hose, an automatic water discharge control unit, and a drawing sensing structure; wherein the drawing hose retracts in the faucet body, and a water inlet end of the drawing hose is connected to a water outlet end of the automatic water discharge control unit;
 the drawing sensing structure comprises sense marks and a sensor; at least two sense marks are on the drawing hose and at intervals along a length direction of the drawing hose, the sense marks at two ends in the length direction are respectively defined as an upper sense mark and a lower sense mark; the sensor is configured to sense movements of the sense marks; 
 during a drawing process of the drawing hose, at least the upper sense mark and the lower sense mark follow a movement of the drawing hose and are sensed by the sensor, such that a first set of sensing signals and a second set of sensing signals are generated during the drawing process of the drawing hose, and the automatic water discharge control unit controls the water outlet end to change water discharge strategies accordingly based on the first set of sensing signals or the second set of sensing signals. 
 
     
     
       2. The drawing faucet according to  claim 1 , wherein: the strategies to change the water discharge are to turn on the water discharge and to turn off the water discharge. 
     
     
       3. The drawing faucet according to  claim 2 , wherein: when two sense marks are provided, that the automatic water discharge control unit controls the water outlet end to change water discharge strategies accordingly based on the first set of sensing signals or the second set of sensing signals is specifically:
 when the automatic water discharge control unit is in a state of turning off the water discharge, two sense mark movement signals at interval are the first set of sensing signals, and the water discharge is controlled to be turned on after a first sense mark movement signal is delayed after the second sense mark movement signal; 
 when the automatic water discharge control unit is in a state of turning on the water discharge, the two sense mark movement signals at interval are the second set of sensing signals, and the water discharge is controlled to be turned off after the first sense mark movement signal, and kept to be turned off and reset after the second sense mark movement signal. 
 
     
     
       4. The drawing faucet according to  claim 2 , wherein: the sense mark is a switch-value sense mark, the sensor is a switch-value sensor; or the sense mark is a vectorial sense mark, the sensor is a vectorial sensor. 
     
     
       5. The drawing faucet according to  claim 1 , wherein: the sense mark is a switch-value sense mark, the sensor is a switch-value sensor; or
 the sense mark is a vectorial sense mark, the sensor is a vectorial sensor. 
 
     
     
       6. The drawing faucet according to  claim 5 , wherein: when the sense mark is selected as the switch-value sense mark, and the sensor is selected as the switch-value sensor, the sense marks are made of permanent magnet materials, the sensor is a magnetic switch. 
     
     
       7. The drawing faucet according to  claim 6 , wherein: the magnetic switch is a reed switch or a Hall sensor. 
     
     
       8. The drawing faucet according to  claim 6 , wherein: the permanent magnet has a ring structure fixedly sleeved on the drawing hose. 
     
     
       9. The drawing faucet according to  claim 5 , wherein: when the sense mark is selected as the vectorial sense mark, and the sensor is selected as the vectorial sensor, the sense marks are made of permanent magnet materials with different magnetic fields, the sensor is a magnetic field detecting device. 
     
     
       10. The drawing faucet according to  claim 9 , wherein: the magnetic field detecting device is a Hall sensor. 
     
     
       11. The drawing faucet according to  claim 9 , wherein: the permanent magnet has a ring structure fixedly sleeved on the drawing hose. 
     
     
       12. The drawing faucet according to  claim 5 , wherein: when the sense mark is selected as the switch-value sense mark, and the sensor is selected as the switch-value sensor, the sense mark is a degaussing unit; the sensor comprises a magnetic unit and a magnetic switch, the magnetic unit and the magnetic switch are provided in the faucet body and are respectively located on opposite sides of the drawing hose; the magnetic switch is configured to sense the magnetic unit; when the degaussing unit is located between the magnetic unit and the magnetic switch, a sense of the magnetic switch to the magnetic unit is shielded. 
     
     
       13. The drawing faucet according to  claim 12 , wherein: the sense mark has a ring structure fixedly sleeved on the drawing hose. 
     
     
       14. The drawing faucet according to  claim 12 , wherein: the magnetic switch is a reed switch or a Hall sensor. 
     
     
       15. The drawing faucet according to  claim 5 , wherein: when the sense mark is selected as the vectorial sense mark, and the sensor is selected as the vectorial sensor, the sense marks are respectively composed of different magnetic poles of a magnet, and the sensor is a magnetic pole determiner. 
     
     
       16. The drawing faucet according to  claim 5 , wherein: when the sense mark is selected as the switch-value sense mark, and the sensor is selected as the switch-value sensor, the sense mark is a color mark, and the sensor is a photoelectric sensor. 
     
     
       17. The drawing faucet according to  claim 16 , wherein the sense mark is formed by arranging a color ring on an outer peripheral surface of the drawing hose, and a color of the color ring is different from a color of the drawing hose. 
     
     
       18. The drawing faucet according to  claim 17 , wherein: the color ring is formed by a sticker or paint. 
     
     
       19. The drawing faucet according to  claim 5 , wherein: when the sense marks are selected as the vectorial sense marks, and the sensor is selected as the vectorial sensor, the sense marks are color marks, and a color of each color mark is different, and the sensor is a photoelectric sensor.